Calculator



FIG. 1 is a front elevational view of a calculator showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a front elevational view thereof with cover in open position; and,

FIG. 8 is a rear elevational view with cover in open position. 

The ornamental design for a calculator, as shown and described. 